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-rw-r--r--tools/perf/util/symbol-elf.c119
-rw-r--r--tools/perf/util/symbol-minimal.c30
-rw-r--r--tools/perf/util/symbol.c22
-rw-r--r--tools/perf/util/symbol.h36
4 files changed, 163 insertions, 44 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index a9a194d..6974b2a 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -536,24 +536,25 @@ static int dso__swap_init(struct dso *dso, unsigned char eidata)
return 0;
}
-int dso__load_sym(struct dso *dso, struct map *map, const char *name, int fd,
- symbol_filter_t filter, int kmodule, int want_symtab)
+
+void symsrc__destroy(struct symsrc *ss)
+{
+ free(ss->name);
+ elf_end(ss->elf);
+ close(ss->fd);
+}
+
+int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
+ enum dso_binary_type type)
{
- struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
- struct map *curr_map = map;
- struct dso *curr_dso = dso;
- Elf_Data *symstrs, *secstrs;
- uint32_t nr_syms;
int err = -1;
- uint32_t idx;
GElf_Ehdr ehdr;
- GElf_Shdr shdr, opdshdr;
- Elf_Data *syms, *opddata = NULL;
- GElf_Sym sym;
- Elf_Scn *sec, *sec_strndx, *opdsec;
Elf *elf;
- int nr = 0;
- size_t opdidx = 0;
+ int fd;
+
+ fd = open(name, O_RDONLY);
+ if (fd < 0)
+ return -1;
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
if (elf == NULL) {
@@ -580,19 +581,88 @@ int dso__load_sym(struct dso *dso, struct map *map, const char *name, int fd,
goto out_elf_end;
}
- sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
+ ss->symtab = elf_section_by_name(elf, &ehdr, &ss->symshdr, ".symtab",
+ NULL);
+ if (ss->symshdr.sh_type != SHT_SYMTAB)
+ ss->symtab = NULL;
+
+ ss->dynsym_idx = 0;
+ ss->dynsym = elf_section_by_name(elf, &ehdr, &ss->dynshdr, ".dynsym",
+ &ss->dynsym_idx);
+ if (ss->dynshdr.sh_type != SHT_DYNSYM)
+ ss->dynsym = NULL;
+
+ ss->opdidx = 0;
+ ss->opdsec = elf_section_by_name(elf, &ehdr, &ss->opdshdr, ".opd",
+ &ss->opdidx);
+ if (ss->opdshdr.sh_type != SHT_PROGBITS)
+ ss->opdsec = NULL;
+
+ if (dso->kernel == DSO_TYPE_USER) {
+ GElf_Shdr shdr;
+ ss->adjust_symbols = (ehdr.e_type == ET_EXEC ||
+ elf_section_by_name(elf, &ehdr, &shdr,
+ ".gnu.prelink_undo",
+ NULL) != NULL);
+ } else {
+ ss->adjust_symbols = 0;
+ }
+
+ ss->name = strdup(name);
+ if (!ss->name)
+ goto out_elf_end;
+
+ ss->elf = elf;
+ ss->fd = fd;
+ ss->ehdr = ehdr;
+ ss->type = type;
+
+ return 0;
+
+out_elf_end:
+ elf_end(elf);
+out_close:
+ close(fd);
+ return err;
+}
+
+int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *ss,
+ symbol_filter_t filter, int kmodule, int want_symtab)
+{
+ struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
+ struct map *curr_map = map;
+ struct dso *curr_dso = dso;
+ Elf_Data *symstrs, *secstrs;
+ uint32_t nr_syms;
+ int err = -1;
+ uint32_t idx;
+ GElf_Ehdr ehdr;
+ GElf_Shdr shdr, opdshdr;
+ Elf_Data *syms, *opddata = NULL;
+ GElf_Sym sym;
+ Elf_Scn *sec, *sec_strndx, *opdsec;
+ Elf *elf;
+ int nr = 0;
+ size_t opdidx = 0;
+
+ elf = ss->elf;
+ ehdr = ss->ehdr;
+ sec = ss->symtab;
+ shdr = ss->symshdr;
+
if (sec == NULL) {
if (want_symtab)
goto out_elf_end;
- sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
+ sec = ss->dynsym;
+ shdr = ss->dynshdr;
if (sec == NULL)
goto out_elf_end;
}
- opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
- if (opdshdr.sh_type != SHT_PROGBITS)
- opdsec = NULL;
+ opdsec = ss->opdsec;
+ opdshdr = ss->opdshdr;
+ opdidx = ss->opdidx;
if (opdsec)
opddata = elf_rawdata(opdsec, NULL);
@@ -619,14 +689,7 @@ int dso__load_sym(struct dso *dso, struct map *map, const char *name, int fd,
nr_syms = shdr.sh_size / shdr.sh_entsize;
memset(&sym, 0, sizeof(sym));
- if (dso->kernel == DSO_TYPE_USER) {
- dso->adjust_symbols = (ehdr.e_type == ET_EXEC ||
- elf_section_by_name(elf, &ehdr, &shdr,
- ".gnu.prelink_undo",
- NULL) != NULL);
- } else {
- dso->adjust_symbols = 0;
- }
+ dso->adjust_symbols = ss->adjust_symbols;
elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
struct symbol *f;
const char *elf_name = elf_sym__name(&sym, symstrs);
@@ -770,8 +833,6 @@ new_symbol:
}
err = nr;
out_elf_end:
- elf_end(elf);
-out_close:
return err;
}
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
index bd8720b..1b16c27 100644
--- a/tools/perf/util/symbol-minimal.c
+++ b/tools/perf/util/symbol-minimal.c
@@ -241,6 +241,31 @@ out:
return ret;
}
+int symsrc__init(struct symsrc *ss, struct dso *dso __used, const char *name,
+ enum dso_binary_type type)
+{
+ int fd = open(name, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ ss->name = strdup(name);
+ if (!ss->name)
+ goto out_close;
+
+ ss->type = type;
+
+ return 0;
+out_close:
+ close(fd);
+ return -1;
+}
+
+void symsrc__destroy(struct symsrc *ss)
+{
+ free(ss->name);
+ close(ss->fd);
+}
+
int dso__synthesize_plt_symbols(struct dso *dso __used, char *name __used,
struct map *map __used,
symbol_filter_t filter __used)
@@ -248,14 +273,13 @@ int dso__synthesize_plt_symbols(struct dso *dso __used, char *name __used,
return 0;
}
-int dso__load_sym(struct dso *dso, struct map *map __used,
- const char *name, int fd __used,
+int dso__load_sym(struct dso *dso, struct map *map __used, struct symsrc *ss,
symbol_filter_t filter __used, int kmodule __used,
int want_symtab __used)
{
unsigned char *build_id[BUILD_ID_SIZE];
- if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0) {
+ if (filename__read_build_id(ss->name, build_id, BUILD_ID_SIZE) > 0) {
dso__set_build_id(dso, build_id);
return 1;
}
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 8f5cabbf..afec3f0 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1026,7 +1026,7 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
{
char *name;
int ret = -1;
- int fd;
+ struct symsrc ss;
u_int i;
struct machine *machine;
char *root_dir = (char *) "";
@@ -1086,13 +1086,12 @@ restart:
continue;
/* Name is now the name of the next image to try */
- fd = open(name, O_RDONLY);
- if (fd < 0)
+ if (symsrc__init(&ss, dso, name, dso->symtab_type) < 0)
continue;
- ret = dso__load_sym(dso, map, name, fd, filter, 0,
+ ret = dso__load_sym(dso, map, &ss, filter, 0,
want_symtab);
- close(fd);
+ symsrc__destroy(&ss);
/*
* Some people seem to have debuginfo files _WITHOUT_ debug
@@ -1359,22 +1358,23 @@ out_failure:
int dso__load_vmlinux(struct dso *dso, struct map *map,
const char *vmlinux, symbol_filter_t filter)
{
- int err = -1, fd;
+ int err = -1;
+ struct symsrc ss;
char symfs_vmlinux[PATH_MAX];
snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
symbol_conf.symfs, vmlinux);
- fd = open(symfs_vmlinux, O_RDONLY);
- if (fd < 0)
- return -1;
if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
dso->symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
else
dso->symtab_type = DSO_BINARY_TYPE__VMLINUX;
- err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0);
- close(fd);
+ if (symsrc__init(&ss, dso, symfs_vmlinux, dso->symtab_type))
+ return -1;
+
+ err = dso__load_sym(dso, map, &ss, filter, 0, 0);
+ symsrc__destroy(&ss);
if (err > 0) {
dso__set_long_name(dso, (char *)vmlinux);
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 37f1ea1..dd9e867 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -11,6 +11,12 @@
#include <stdio.h>
#include <byteswap.h>
+#ifndef NO_LIBELF_SUPPORT
+#include <libelf.h>
+#include <gelf.h>
+#include <elf.h>
+#endif
+
#ifdef HAVE_CPLUS_DEMANGLE
extern char *cplus_demangle(const char *, int);
@@ -219,6 +225,34 @@ struct dso {
char name[0];
};
+struct symsrc {
+ char *name;
+ int fd;
+ enum dso_binary_type type;
+
+#ifndef NO_LIBELF_SUPPORT
+ Elf *elf;
+ GElf_Ehdr ehdr;
+
+ Elf_Scn *opdsec;
+ size_t opdidx;
+ GElf_Shdr opdshdr;
+
+ Elf_Scn *symtab;
+ GElf_Shdr symshdr;
+
+ Elf_Scn *dynsym;
+ size_t dynsym_idx;
+ GElf_Shdr dynshdr;
+
+ bool adjust_symbols;
+#endif
+};
+
+void symsrc__destroy(struct symsrc *ss);
+int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
+ enum dso_binary_type type);
+
#define DSO__SWAP(dso, type, val) \
({ \
type ____r = val; \
@@ -334,7 +368,7 @@ ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
struct machine *machine, u64 addr,
u8 *data, ssize_t size);
int dso__test_data(void);
-int dso__load_sym(struct dso *dso, struct map *map, const char *name, int fd,
+int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *ss,
symbol_filter_t filter, int kmodule, int want_symtab);
int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map,
symbol_filter_t filter);
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